677869 has 4 divisors (see below), whose sum is σ = 679644. Its totient is φ = 676096.

The previous prime is 677857. The next prime is 677891. The reversal of 677869 is 968776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133225 + 544644 = 365^2 + 738^2 .

It is a cyclic number.

It is not a de Polignac number, because 677869 - 2⁹ = 677357 is a prime.

It is a super-2 number, since 2×677869² = 919012762322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52 + ... + 1165.

It is an arithmetic number, because the mean of its divisors is an integer number (169911).

2⁶⁷⁷⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

677869 is a deficient number, since it is larger than the sum of its proper divisors (1775).

677869 is a wasteful number, since it uses less digits than its factorization.

677869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774.

The product of its digits is 127008, while the sum is 43.

The square root of 677869 is about 823.3280026818. The cubic root of 677869 is about 87.8446380636.

The spelling of 677869 in words is "six hundred seventy-seven thousand, eight hundred sixty-nine".